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Must-Know Math™Answer Keys and Printable Bonus Activities

Must-Know Math: Problem Solving for Grades 4-5
Must-Know Math: 25 Activities to Build Key Skills in 4th Grade

  • Answer Key
    Answers to all 4th-grade activities in an easy printable format Grade 4 Answer Key (PDF)

  • Printable Bonus
    Print (in black and white or color) the tans that appear on pages 14-15. Students can cut them apart and use them to complete the activity.
    Tangram (PDF)

Must-Know Math: 25 Activities to Build Key Skills in 5th Grade

  • Answer Key
    Answers to all 5th-grade activities in an easy printable format Grade 5 Answer Key (PDF)

Must-Know Math: 25 Activities to Build Key Skills in 6th Grade

  • Answer Key
    Answers to all 6th-grade activities in an easy printable format Grade 6 Answer Key (PDF)

  • Printable Bonus
    Print and cut apart the cards for students to complete the bonus activity on page 28.
    Letter Cards (PDF)

Must-Know Math: 25 Activities to Build Key Skills in 1st Grade

  • Answer Key
    Answers to all 1st-Grade activity pages in an easy printable format Grade 1 Answer Key (PDF)

  • Printable Bonus
    Fun practice for reading analog and digital clocks. Print two sets of cards to use separately or combined.
    Telling-Time Memory Cards (PDF)

Must-Know Math: 25 Activities to Build Key Skills in 2nd Grade

  • Answer Key
    Answers to all 2nd-Grade activity pages in an easy printable format Grade 2 Answer Key (PDF)

  • Printable Bonus
    A memory game to reinforce reading analog and digital clocks, plus time in words. Print two sets of cards to use separately or combined.
    Telling-Time Triples (PDF)

Must-Know Math 25 Activities to Build Key Skills in 3rd Grade

  • Answer Key
    Answers to all 3rd-Grade activity pages in an easy printable format Grade 3 Answer Key (PDF)

  • Printable Bonus
    Hands-on activities to reinforce students’ understanding of equivalent fractions.
    Fraction Action (PDF)

Must-Know Math Addition & Subtraction
Must-Know Math Fractions

  • Answer Key
    Answers to all fraction activity pages in an easy printable format Fractions Answer Key (PDF)

Must-Know Math Multiplication

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